<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-row :gutter="20">
        <el-col :span="8">
            <!-- clearable 删除内容
            @clear 删除触发事件 -->
          <el-input
            placeholder="请输入内容"
            v-model="queryInfo.query"
            clearable
            @clear="getGoodsList"
          >
            <el-button slot="append" icon="el-icon-search"
            @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
            <el-button type="primary" @click="goAddpage">添加</el-button>
        </el-col>
      </el-row>


      <!-- table 表格区域-->
      <el-table :data="goodslist" border stripe>
          <el-table-column type="index">
          </el-table-column>
           <el-table-column label="商品名称" prop="goods_name"> </el-table-column>
           <el-table-column label="商品价格(元)" prop="goods_price" width="95px"> </el-table-column>
           <el-table-column label="商品重量" prop="goods_weight" width="70px"> </el-table-column>
           <el-table-column label="创建时间" prop="add_time" width="140px">
               <template slot-scope="scope">
                   {{scope.row.add_time | dateFormat}}
               </template>
           </el-table-column>
           <el-table-column label="操作" width="130px">
               <template slot-scope="scope">
                   <el-button type="primary" size="mini" icon="el-icon-edit"></el-button>
                   <el-button type="danger" size="mini" icon="el-icon-edit" @click="removeById(scope.row.goods_id)"></el-button>
               </template>
        </el-table-column>
      </el-table>

          <!-- 分页区域 -->
      <!--  changeCurrentPage()不能加括号，应该下面函数有参数，这里不给值默认会传undefined -->
      <!-- 
         @size-change 监听 pagesize改变的事件 （选择显示多少条数据）
         @current-change  currentPage当前页数 改变时会触发 下一页
          current-page当前页数
          page-sizes 每页显示个数选择器的选项设置
          total总条目数 page-size每页显示条目个数默认10 prev上一页 pager页数 next下一页
          sizes选择器
         -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[5, 10, 15, 20]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
        //查询参数对象
        queryInfo:{
            query:'',
            pagenum: 1,
            pagesize: 10
        },

        //商品列表
        goodslist:[],
        //总数据条数
        total:0
    }
  },
  created() {
      this.getGoodsList()
  },
  methods: {
      //根据分页获取对应的商品列表
      async getGoodsList(){
          const {data:res} =await this.$http.get('goods',{params:this.queryInfo})
          if(res.meta.status !== 200){
              return this.$message.error('获取商品列表失败！')
          }
          this.$message.success('获取商品列表成功!')
          this.goodslist = res.data.goods
          this.total = res.data.total
      },

      //监听 pagesize改变的事件（选择显示多少条数据）
      handleSizeChange(newSize){
          this.queryInfo.pagesize = newSize
          this.getGoodsList()
      },
      //监听 页码值下一页 改变的事件
      handleCurrentChange(newPage){
          this.queryInfo.pagenum = newPage
          this.getGoodsList()
      },

      async removeById(id){
         //弹框询问用户是否删除数据
          const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)

           //如果用户确认删除，则返回值为字符串confirm
        //如果用户取消了删除，则返回值为字符串 cancel
        //  console.log(res)
        if(confirmResult !== 'confirm'){
          return this.$message.info('已取消删除！')
        }

        const {data:res} = await this.$http.delete(`goods/${id}`)

        if(res.meta.status !== 200){
          return this.$message.error('删除失败!')
        }

        this.$message.success('删除成功!')
        this.getGoodsList()
      },

      goAddpage(){
        this.$router.push('/goods/add')
      }

  },
}
</script>

<style lang="less" scoped>
</style>